i guess it's the same everywhere.
as long as people will fall for these tricks they will be used.
it's the same here, every now and then there is a big "sale" from a big electronics seller.
It's just that during the "special sales days" the prices are often more then the week before without the sale
The so called normal base price is suddenly increased so much that the 20% reduction is even more expensive then regular price without any "reduction"